/**
 * @param {string} path
 * @returns {Boolean}
 */
export function isExternal(path) {
  return /^(https?:|mailto:|tel:)/.test(path)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validUsername(str) {
  const valid_map = ['admin', 'editor']
  return valid_map.indexOf(str.trim()) >= 0
}

/**
 * @param {string} url
 * @returns {Boolean}
 */
export function validURL(url) {
  const reg = /^(https?|ftp):\/\/([a-zA-Z0-9.-]+(:[a-zA-Z0-9.&%$-]+)*@)*((25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9]?[0-9])){3}|([a-zA-Z0-9-]+\.)*[a-zA-Z0-9-]+\.(com|edu|gov|int|mil|net|org|biz|arpa|info|name|pro|aero|coop|museum|[a-zA-Z]{2}))(:[0-9]+)*(\/($|[a-zA-Z0-9.,?'\\+&%$#=~_-]+))*$/
  return reg.test(url)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validLowerCase(str) {
  const reg = /^[a-z]+$/
  return reg.test(str)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validUpperCase(str) {
  const reg = /^[A-Z]+$/
  return reg.test(str)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function validAlphabets(str) {
  const reg = /^[A-Za-z]+$/
  return reg.test(str)
}

/**
 * @param {string} email
 * @returns {Boolean}
 */
export function validEmail(email) {
  const reg = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
  return reg.test(email)
}

/**
 * @param {string} str
 * @returns {Boolean}
 */
export function isString(str) {
  if (typeof str === 'string' || str instanceof String) {
    return true
  }
  return false
}

/**
 * @param {Array} arg
 * @returns {Boolean}
 */
export function isArray(arg) {
  if (typeof Array.isArray === 'undefined') {
    return Object.prototype.toString.call(arg) === '[object Array]'
  }
  return Array.isArray(arg)
}

/**
 * 校验手机号是否正确
 * @param {String} value 
 * @returns 
 */
export function isMobile(value) {
  return /^1[3|4|5|6|7|8|9][0-9]\d{8}$/.test(value);                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      return /^(https?|ftp):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(\#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i.test(value);
}

/**
 * 校验是否为身份证
 * @param { String } value 需要校验的字符串
 * @returns {Boolean} 
 */
export function isIdCard(value) {
  // 1.传入15位或者18位身份证号码，18位号码末位可以为数字或X
  var idCard = value;
  // 2.身份证中的X，必须是大写的
  if(value.indexOf("x") !== -1){
      return false;
  }
  // 3.判断输入的身份证长度
  if (!(/(^\d{15}$)|(^\d{17}([0-9]|X)$)/.test(idCard))) {
      return false;
  }
  // 4.验证前两位城市编码是否正确
  var aCity = { 11: "北京", 12: "天津", 13: "河北", 14: "山西", 15: "内蒙古", 21: "辽宁", 22: "吉林", 23: "黑龙江",
      31: "上海", 32: "江苏", 33: "浙江", 34: "安徽", 35: "福建", 36: "江西", 37: "山东", 41: "河南", 42: "湖北",
      43: "湖南", 44: "广东", 45: "广西", 46: "海南", 50: "重庆", 51: "四川", 52: "贵州", 53: "云南", 54: "西藏",
      61: "陕西", 62: "甘肃", 63: "青海", 64: "宁夏", 65: "新疆", 71: "台湾", 81: "香港", 82: "澳门", 91: "国外" };
  if (aCity[parseInt(idCard.substr(0, 2))] == null) {
      return false;
  }
  // 5.验证出生日期和校验位
  if (validId15(idCard) || validId18(idCard)) {
      return true;
  } else {
      return false;
  }
  // 身份证18位号码验证
  function validId18(str) {
      if (str.length != 18){
          return false;
      }
      //1. 出生日期验证
      var re = new RegExp(/^(\d{6})(\d{4})(\d{2})(\d{2})(\d{3})([0-9]|X)$/);
      var arrSplit = str.match(re); //检查生日日期是否正确
      if (arrSplit != null) {
          if (!YearMonthDayValidate(arrSplit[2], arrSplit[3], arrSplit[4])) {
              return false;
          }
      }else {
          return false;
      }
      //2. 校验位验证
      var iW = new Array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1);//加权因子
      var iSum = 0;
      for (var i = 0; i < 17; i++) {
          var iC = str.charAt(i);
          var iVal = parseInt(iC);
          iSum += iVal * iW[i];
      }
      var iJYM = iSum % 11;//取模
      var sJYM = '';
      //获取的模查找对应的校验码字符值
      if (iJYM == 0) sJYM = "1";
      else if (iJYM == 1) sJYM = "0";
      else if (iJYM == 2) sJYM = "x";
      else if (iJYM == 3) sJYM = "9";
      else if (iJYM == 4) sJYM = "8";
      else if (iJYM == 5) sJYM = "7";
      else if (iJYM == 6) sJYM = "6";
      else if (iJYM == 7) sJYM = "5";
      else if (iJYM == 8) sJYM = "4";
      else if (iJYM == 9) sJYM = "3";
      else if (iJYM == 10) sJYM = "2";
      var cCheck = str.charAt(17).toLowerCase();
      if (cCheck != sJYM) {
          return false;
      }
      return true;
  }

  // 身份证15位(1984-2004)身份验证
  function validId15(str) {
      if (str.length != 15) {
          return false;
      }
      //1. 出生日期验证
      var re = new RegExp(/^(\d{6})(\d{2})(\d{2})(\d{2})(\d{3})$/);
      var arrSplit = str.match(re); //检查生日日期是否正确
      if (arrSplit != null) {
          if (parseInt(arrSplit[2].substr(1)) > 0) {
              arrSplit[2] = "19" + arrSplit[2];
          } else {
              arrSplit[2] = "20" + arrSplit[2]
          }
          if (!YearMonthDayValidate(arrSplit[2], arrSplit[3], arrSplit[4])) {
              return false;
          }
      } else {
          return false;
      }
      return true;
  }

  //出生日期的年月日验证
  function YearMonthDayValidate(year, month, day) {
      year = parseInt(year); //年
      month = parseInt(month);//月
      day = parseInt(day);//日
      //判断年，月,日是否为空
      if (isNaN(year) || isNaN(month) || isNaN(day)) {
          return false;
      }
      //判断月是否是在1-12月之间
      if (month < 1 || month > 12) {
          return false;
      }
      //返回当月的最后一天
      var date = new Date(year, month, 0);
      //判断是否超过天数范围
      if (day < 1 || day > date.getDate()) {
          return false;
      }
      return true;
  }
}
